TL431/TL431A
Programmable Shunt Regulator
Features
Programmable Output Voltage to
Low Dynamic Output Impedance
Sink Current Capability of 1.0 to
Equivalent Full-Range Temperature
50ppm/°C Typical
Temperature Compensated For Operation
Operating Temperature Range
Low Output Noise Voltage
Fast Turn-on Response
LM431 datasheet      

High-speed diodes 
 FEATURES
· Hermetically sealed leaded glass SOD27 (DO-35) package
· High switching speed: max. 4 ns
· General application
· Continuous reverse voltage: max. 100 V
· Repetitive peak reverse voltage: max. 100 V
· Repetitive peak forward current: max. 450 mA.
1N4148 datasheet

ULN2003A-ULN2004A ULN2001A-ULN2002A
SEVEN DARLINGTON ARRAYS
The ULN2001A, ULN2002A, ULN2003 and
ULN2004Aare high voltage,high current darlington
arrays each containing seven open collector darlington
pairs with common emitters.
ULN2003A datasheet